Even residents in Mumbai often mistakenly assume that the city has two airports. There is, in fact, only one with two terminals, T1 and T2, the former largely reserved for domestic flights. They share one runway. They handle 50 million passengers per year; for a metropolis of Mumbai’s size, it is not enough. Just how much below capacity can be seen in the sheer scale of the new airport inaugurated by Prime Minister Narendra Modi on October 9.